my boyfriend is getting abused

Me and my boyfriend (16 and 15) had a pretty bad fight today which ended our relationship. We were talking and he said “you have no idea how bad my life is” and he told me whenever his parents go out drinking, his dad comes home and hits him, he was crying so hard on the phone I just cried as well. He doesn’t tell me things about his life, he likes to keep things to himself but I wish he told me that sooner, maybe I could of helped him. His dad hasn’t done it in a while but I’m scared if he does it again, or just his younger brother or his mother. He told me his mam is scared to do something and his dad doesn’t touch his younger brother, it’s always him, he didn’t even tell non of his friends or family only me. I need advice on how to help him and myself because I’m having a rough time because I never thought that was going on in his life.